Apparatus for disintegrating, mixing, aerating, and ejecting sand or the like



July l, 1930.

APPARATUS FOR DIsINT-EGRATING 1926 2 Sheets-Sheet Filevd Dec. 8

July l, 1930. G. SPENCER APPARATUS FOR DISINTEGRATING, MIXING', AERATING, AND EJEGTING SAND 0R THE LKE Filed Dec. s. 1926 2 sheets-sheet 2 CnCcf ATToRNeYs- Patented duly 1, 1930 stares GEQRGE SPENCER, 0F HEYWOOD, ENGLAND APPARATUS EUR DISINTEGBATING, MIXING, AEBATING, AND EJECTING SAND O THE LIKE Application filed December 8, 1926, Serial No. 153,318, andin Great Britain January 15, 1926.

This invention relates to an apparatus for disintegrating, mixing, aerating and ejecting sand or the like, as for instance for blending, disintegrating and delivering foundry sand as will be understood, and has for its object to provide a machine which will perform such of the aforesaid operations as are required according to the kind or conditions of the material or substance to be dealt with in a satisfactory and expeditious manner, and which will not be expensive to construct or to work. j

According to this invention a drum having projections on its periphery is rotatably mounted within a partially enclosing casing, the material to be treated being fed on to the projections on the drum as they rapidly rotate and in front of an adjustable plate, screen or fence, the material being caught and bounced and carried forward in recurring rolling motions by the projections up to the edge of theadjustable plate, screen or fence vand thereafter being delivered tangentially from under it, the adjustment of the plate,

screen or fence to and from the drum regulating the condition of the delivered material.

The invention is more particularly set forth with reference to the accompanying drawings wherein- F ig. l is a side elevation of a machine according to the invention for treating sand for foundry use.

Fig. 2 is a plan thereof.

f Fig. 3 is an end elevation and Fig. 4 is an enlarged detail of the hopper showing the rotatable drum and the adjustable plate, screen or fence.

Fig. 5 is a detail of one of the pedestals for supporting the shaft on which the drum rotates, and

Fig. 6 is a view showing a further portion of the drum periphery indicating an arrangement of the projections on the periphery.

Referring to the drawings, the rotatable r drum a is mounted by means of spokes and /or end plates, not shown in the drawings, on a shaft b, which is mounted at its ends in suitable bearings c, the bearings shown in the drawings being built up detachable sections. The lower section of each bearing is bolted to the top lange of a lower end plate c which is supported on a base f. Y Mounted on said lower end'plates are a pair of flanged, semiclrcular plates (Z, the plates (Z and e together "forming end walls of a chamber in which the drum ais mounted, the end wall portions l being cutaway to fit the bearings c, as shown` in F ig. 5.

Joining the end walls of the drum casing re covers which thus enclose the drum entirely except for an opening which is left to be covered by the feed hopper g. and an opening at the front inthe direction of rotation of the drum as shown by the arrow, for the treat-ed material to be thrown out; these covers Vas will be understood are'conveniently removable.

The rotatable drum a is provided with projections on its periphery and in the construction illustrated the projections are formed by passing and securing rivets or pins 7L through the periphery of the drum from inside. The projections are arranged in rows, those in each rou7 being spaced apart across the width of the drum and the projections in the various rows being spaced or staggered with relation to the rows in front, in the manner indicated in Fig. 6 of the drawings.

Adjustably mounted on the end plates of the drum casing so that it can be moved into the desired position for discharging its contents in the best manner is a feed hopper g open toward the back of the casing and arranged to allow the material fed into the hopper to fall toward the drum a as it is rising and at a point near the top which material is engaged by the projections 7L and is bounced and carried forward, in recurring rolling inotions within the hopper. At the front of the hopper is a plate, screen or fence z adjustable to and from the drum a and the ineness of the treated material passing under the edge of this plate, fence or screen can be regulated by adjusting it to or from the projections, if the space between the edge and the projections is large, coarse material can be passed, while by adjusting it closely to the projections the delivered material may be in the form of a fine powder. The hopper may have guide plates within it for directing and controlling the llow of material on to the drum.

A machine according to this invention is provided with means such as road wheels j and handles c whereby it may be easily moved and has also a pulley Z on the shaft b. It is necessary that the drum should be able to attain a high speed of rotation, which in ordinary circumstances must not be less than 1450 revolutions per minute, and may be .higher and t this end it is convenient to mount an electric motor m on the machine connected to the pulley Z by a suitable belt which will drive the drum at the required speed; the drum may, however, be rotated by any other convenient means according to mgihxements.

en it is desired to use the machine the plate, screen or fence yi is adjusted as required and the drum is set rotating at the required "speed and the material is fed into the hopper.

As the material falls through the hopper it is caught by the projections on the drum and is thrown upward and forward and is bounced up and rolled as it falls on the next row of projections. By this means it is broken up, mixed and aeratcd and is reduced to the desired ineness and conditions before it is shot forward in a stream through the opening in the front of the casing, which opening may have guide plates to direct the stream. Any hard material or foreign bodies which may be ut in the hopper and which are not capab e of being broken up, are thlwn back up the hopper and are ejected therefrom, a hood g being provided to the hopper to prevent these bodies from being thrown vertically above the hopper. It will be realized that material fed into the hopper Can not be carried out from under the ilate, screen or fence directly but must be su jected to a rolling and bouncing under the action of the projections, as indicated in Fig. 4, until finally it is carried out. This action is rendered possible by the fact that as soon asthe material comes in contact with the project-ions it is thrown off tangentially at 'whatever point it touches, and it is only the material which falls on the projections in auch a position that the tangential throw will `ss it below the edge of the plate, screen or ence andin the required condition as to neness that is discharged from the machine.

While the invention has been described with reference to projections arranged in rows straight across the drum, the rows may be arranged angularly or on a curved line or pitch or otherwise without departing from the invention.

What I claim as my invention and desire to secure by Letters Patent is `1. A'machine for disintegrating, mixing,

aerating and ejecting sand, comprising a casing, a d rum rotatably mounted therein, rigid projections disposed on the periphery of said drum, said casing having a feed opening in position to ensure that material dropped through said opening will be engaged by said projections as they are rising durlng the rotation of said drum, an outlet above and in front of said drum, and an adjustable fence in said outlet to regulate the Outlet opening.

2. A machine for disintegrating, mixing, aerating and ejeeting sand, comprising a casing, a drum rotatably mounted therein, rigid projections on said drum, said easing having an opening, a hopper disposed above said opening, and a hood projectin backward over the top of said hopper an above said opening.

3. A machine for disintegrating, mixing, aerating and ejecting sand, comprising a casing. a drum rotatablyT mounted therein, rigid projections disposed in staggered relation on said drum, said casing having an opening above and behind the axis on which said drum rotates, an adjustable hood projecting backward over said opening and mounted on said casing, and an adjustable fence at the front edge of said opening and adapted to form an outlet between said 'fence and said projections.

4. A machine for disintegrating, mixing, aerating and ejeeting sand, comprising a casing, a shaft mounted for rotation in said casing, radially extending rigid projections disposed about said shaft, said easing having an opening in the top thereoiB above and behind said shaft. an adjustable hopper on said casing and over said opening, a hood on said hopper, an adjustable fence on the front edge of said hopper, said hopper and hood and fence being disposed with reference to said projections in such a position that material put into said casing therethrough will be struck by said projections as they are ris ing and moving forward, whereby said material will be bounced and rolled by and about said projections and will, when reduced in size by said treatment, be hurled tangentially from said projections below said fence.

In testimony whereof I have signed my name to this specification.

GEORGE SPENCER.

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